根据镜像创建KVM主机

Hwsdien included in Linux

2014-12-29 2014-12-29 227 words 2 minutes

Contents

检查是否开启CPU虚拟化

cat /proc/cpuinfo | egrep "(vmx|svm)" --color=always

禁用selinux

vim /etc/selinux/config
SELINUX=disabled

setenforce 0

设置转发

sed -i 's/^\(net.ipv4.ip_forward =\).*/\1 1/' /etc/sysctl.conf; sysctl -p

安装

yum -y install @virt* dejavu-lgc-* xorg-x11-xauth tigervnc libguestfs-tools policycoreutils-python

设置libvirt自动开启并重启

chkconfig libvirtd on;reboot

验证是否加载KVM模块

lsmod | grep kvm

创建虚拟机做为镜像

查看可选用的操作系统
```
virt-install --os-variant=list | more
```

安装CentOS 6.5

下载

wget http://mirrors.aliyun.com/centos/6.5/isos/x86_64/CentOS-6.5-x86_64-minimal.iso

创建磁盘文件

qemu-img create -f qcow2 -o preallocation=metadata /data/centos65.qcow2 8G

安装

virt-install --os-variant=virtio26 --network model=virtio,bridge=br0 --disk /data/centos65.qcow2,sparse=false,bus=virtio,size=8 --cdrom=/data/CentOS-6.5-x86_64-minimal.iso --graphics vnc,listen=0.0.0.0,port=5930,password=123123 --vcpus=1 --ram=512 --name=vm01

VNC 连接

打开finder -> connect to server
vnc://10.211.55.50:5930

启动
```
virsh start vm01
```

创建虚拟机

生成派生镜像

qemu-img create -f qcow2 /data/centos3.qcow2 -o backing_file=/data/centos65.qcow2 8G

编辑配置文件 centos3.xml

vim /data/centos3.xml

<domain type='kvm'>
	<name>vm03</name>
	<memory unit='KiB'>524288</memory>
	<currentMemory unit='KiB'>524288</currentMemory>
	<vcpu placement='static'>2</vcpu>
	<os>
		<type arch='x86_64' machine='rhel6.6.0'>hvm</type>
		<boot dev='hd'/>
	</os>
	<features>
		<acpi/>
		<apic/>
		<pae/>
	</features>
	<clock offset='utc'/>
	<on_poweroff>destroy</on_poweroff>
	<on_reboot>restart</on_reboot>
	<on_crash>restart</on_crash>
	<devices>
		<emulator>/usr/libexec/qemu-kvm</emulator>
		<disk type='file' device='disk'>
			<driver name='qemu' type='qcow2' cache='none'/>
			<source file='/data/centos3.qcow2'/>
			<target dev='vda' bus='virtio'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
		</disk>
		<interface type='bridge'>
			<mac address='52:54:00:fd:77:3c'/>
			<source bridge='br0'/>
			<virtualport type='openvswitch'/>
			<model type='virtio'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
		</interface>
		<serial type='pty'>
			<target port='0'/>
		</serial>
		<console type='pty'>
			<target type='serial' port='0'/>
		</console>
		<input type='mouse' bus='ps2'/>
			<graphics type='vnc' port='5931' autoport='no' listen='0.0.0.0' passwd='123123'>
			<listen type='address' address='0.0.0.0'/>
		</graphics>
		<video>
			<model type='cirrus' vram='9216' heads='1'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
		</video>
		<memballoon model='virtio'>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
		</memballoon>
	</devices>
</domain>

自定义虚拟机

virsh define /data/centos3.xml

启动

virsh start vm03

VNC 连接

打开finder -> connect to server
vnc://10.211.55.50:5931